docs: def _normalize(self, address):
          """
          Normalize prefixes, suffixes and other to make matching original to returned easier.
          """
          normalized_address = []
          if self.logger: self.logger.debug("Normalizing Address: {0}".format(address))
          for token in address.split():
              if token.upper() in self.parser.suffixes.keys():
                  normalized_address.append(self.parser.suffixes[token.upper()].lower())
              elif token.upper() in self.parser.suffixes.values():
                  normalized_address.append(token.lower())
              elif token.upper().replace('.', '') in self.parser.suffixes.values():
                  normalized_address.append(token.lower().replace('.', ''))
              elif token.lower() in self.parser.prefixes.keys():
                  normalized_address.append(self.parser.prefixes[token.lower()].lower())
              elif token.upper() in self.parser.prefixes.values():
                  normalized_address.append(token.lower()[:-1])
              elif token.upper() + '.' in self.parser.prefixes.values():
                  normalized_address.append(token.lower())
              else:
                  normalized_address.append(token.lower())
          return normalized_address